# FidelityFX Super Resolution 2

> real-time, temporal image upscaling technology by AMD

**Wikidata**: [Q121890404](https://www.wikidata.org/wiki/Q121890404)  
**Source**: https://4ort.xyz/entity/fidelityfx-super-resolution-2

## Summary
FidelityFX Super Resolution 2 (FSR 2) is a real-time, temporal image upscaling technology developed by AMD. It is a free software library designed to enhance graphical performance by rendering frames at a lower resolution and upscaling them to a higher target resolution using temporal data.

## Key Facts
- **Developer:** AMD (Advanced Micro Devices), an American multinational semiconductor company.
- **Classification:** Image scaling algorithm, software library, and free software.
- **License:** MIT License.
- **Operating System:** Microsoft Windows.
- **Programming/Shading Languages:** High Level Shader Language (HLSL) and OpenGL Shading Language (GLSL).
- **Preceded by:** FidelityFX Super Resolution 1.
- **Succeeded by:** FidelityFX Super Resolution 3 (which adds frame interpolation).
- **Latest Version:** 2.2.1 (released June 9, 2023).
- **Repository:** Hosted on GitHub under the GPUOpen-Effects organization.

## FAQs
### Q: What is the main function of FidelityFX Super Resolution 2?
A: FSR 2 is used for real-time temporal image upscaling. It allows software to render at a lower internal resolution to increase performance while maintaining high-quality visual output through advanced scaling algorithms.

### Q: Is FidelityFX Super Resolution 2 open source?
A: Yes, it is classified as free software and is distributed under the MIT License. This allows users to freely run, study, change, and distribute the original or modified versions of the code.

### Q: What is the difference between FSR 2 and FSR 3?
A: While FSR 2 focuses on real-time temporal image upscaling, its successor, FSR 3, incorporates both image upscaling and frame interpolation technology.

### Q: Which operating systems support FSR 2?
A: Based on the technical requirements, FidelityFX Super Resolution 2 is designed to run on the Microsoft Windows family of operating systems.

## Why It Matters
FidelityFX Super Resolution 2 represents a critical evolution in AMD's graphics technology by transitioning from spatial upscaling to temporal upscaling. By utilizing data from previous frames, FSR 2 provides a more sophisticated method for reconstructing high-resolution images compared to its predecessor. This technology is vital for modern gaming and rendering applications, as it allows users to achieve higher frame rates without the heavy hardware tax of native high-resolution rendering.

As a free software library under the MIT License, FSR 2 provides an accessible, high-performance tool for developers across the industry. Its compatibility with standard shading languages like HLSL and GLSL ensures it can be integrated into various graphics pipelines. By lowering the barrier to entry for high-quality upscaling, AMD enables a wider range of hardware—including older or less powerful GPUs—to run demanding software more efficiently on the Microsoft Windows platform.

## Notable For
- **Temporal Reconstruction:** Unlike spatial upscalers, FSR 2 uses temporal data to improve image quality and stability in motion.
- **Open Access:** Distributed via GitHub under the permissive MIT License, encouraging widespread adoption and modification.
- **Cross-Language Support:** Developed using both High Level Shader Language (HLSL) and OpenGL Shading Language (GLSL).
- **Rapid Iteration:** The technology saw frequent stable updates, moving from version 2.0.1 in June 2022 to version 2.2.1 by June 2023.

## Body

### Technical Architecture
FidelityFX Super Resolution 2 is an image scaling algorithm and software library. It is built to function in real-time environments, specifically targeting temporal image upscaling. The technology is implemented using:
*   **High Level Shader Language (HLSL)**
*   **OpenGL Shading Language (GLSL)**

### Development and Distribution
The technology was developed by **AMD**, a semiconductor company headquartered in Santa Clara, California. It is part of the GPUOpen initiative and is hosted in a public source code repository on GitHub. The software is licensed under the **MIT License**, which categorizes it as free software that users can study and modify.

### Version History
FSR 2 has undergone several stable releases since its introduction:
*   **Version 2.0.1 / 2.0.1a:** Released on June 22, 2022.
*   **Version 2.1.0:** Released on September 8, 2022.
*   **Version 2.1.1:** Released on September 15, 2022.
*   **Version 2.1.2:** Released on October 19, 2022.
*   **Version 2.2.0:** Released on February 16, 2023.
*   **Version 2.2.0a:** Released on February 22, 2023.
*   **Version 2.2.1:** Released on June 9, 2023 (Current preferred stable version).

### Relationship to Other Technologies
FSR 2 is the direct successor to **FidelityFX Super Resolution 1**. It has since been succeeded by **FidelityFX Super Resolution 3**, which expanded the feature set to include frame interpolation. The technology is primarily developed for the **Microsoft Windows** operating system.

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## References

1. [Source](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/blob/master/LICENSE.txt)
2. [Release 2.0.1a. 2022](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.0.1a)
3. [Release 2.0.1. 2022](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.0.1)
4. [Release 2.1.0. 2022](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.1.0)
5. [Release 2.1.1. 2022](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.1.1)
6. [Release 2.1.2. 2022](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.1.2)
7. [Release 2.2.0a. 2023](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.2.0a)
8. [Release 2.2.0. 2023](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.2.0)
9. [Release 2.2.1. 2023](https://github.com/GPUOpen-Effects/FidelityFX-FSR2/releases/tag/v2.2.1)